Question

Can someone please answer all questions for me thank you

Documentl Word des butler Tell me Home Insert Draw Design Layout Referer Mailing Review View Help Question 14 What is the ratio of base to acid needed to obtain a pH of 4.66 for buffer containing HCNO and NaCNO? The K, of Havo is 20-10 Question 17 If 16.25 mL of the analyte HNO, is titrated with 10.43 mL of 0.250 M Ca(OH)2, determine the molarity of the analyte solution Question 18 How many mL of the titrant Sr(OH)2 is needed to titrate 4.31 mL of 0.75 M HCIO4 if the molarity of the titrant is 0.65? Question 19 How many mL of the titrant HBr is needed to titrate 7.08 mL of 0.044 M NH:CI, if the molarity of the titrant is 0.078? Question 20 What is the pH of when 0.060 L of 0.0067 M HCN is titrated to its equivalence point with 0.033 L of NaOH? The K, of HCN is 4.9x10- 10 ge 1 of 1 141 words 80% 914 PM 10/20/2019

Answer 1

PH 04 bufFen = 4.66 4 Desioned ka = Acid dissociation Constant 2-0XIO Pha log Ka Pka log 1 3.698 CNacNOJ PH 1 LH CNO fNacno] 3.698 + log EHENO 4-66 ENGCNO O.9610 laking antileg boh Bides we get NGCNO CHCNO AO 9610 to CINaCNo 9-14 LH CNOJ Balel - 9-14 EAud tor Complete titation No of equivadents ot HNg NO of equivalents of cacoH)2 11 fuctor of (alon Volume of HN V= 16-25mL ireplacatbl o 2 Suppore mdaity of CaloH) M, =0-250M Volume of HN olution be 'M Molarity of 10.43ML CaloH, V = M, V, 2M2V